The Application on the Time-domain Differential Signal Detection Technique of OFDM
Yunong Zhang · Journal of Tianjin Vocational Institutes · 2006
It is predicted that OFDM technique will become the mainstream technique of the forth generation mobile communication system.Its characteristic that each subcarrier is orthogonal can not only reduce the interference between the subcarriers,but also improve the utilization ratio of the frequency spectrum.Meanwhile,the system can antagonize the frequency selective fading and the selective interference very well.The binary data bit of OFDM is modulated on the corresponding subcarrier by PSK or QAM.The receiving end is needed to detect the signal to restore the signal exactly.The time-domain differential signal detection technique is implemented by comparing the amplitude and the phase of the current OFDM sign subcarrier and the previous one.